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Class 9 Mathematics - MIX - Squares and Square Roots Easy Quiz
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\(25a^2\) किस व्यंजक का वर्ग है?
Which expression has \(25a^2\) as its square?
#algebra
#squares
#square roots
#monomials
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A \(5a\)
B \(25a\)
C \(5a^2\)
D \(10a\)
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क्योंकि \((5a)^2=5^2\times a^2=25a^2\), इसलिए सही उत्तर \(5a\) है। विकल्प \(25a\) का वर्ग \(625a^2\) और \(5a^2\) का वर्ग \(25a^4\) होगा। परीक्षा-युक्ति: किसी पूर्ण वर्ग एकपदी का वर्गमूल निकालते समय गुणांक का वर्गमूल और चर की घात का आधा लें। / Since \((5a)^2=5^2\times a^2=25a^2\), the correct expression is \(5a\). The square of \(25a\) is \(625a^2\), while the square of \(5a^2\) is \(25a^4\). Exam tip: to find the square root of a perfect-square monomial, take the square root of the coefficient and halve the exponent of each variable.
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